Now that I think about it a little more, it's probably more applicable to be mean to anyone in an outgroup.

And now that I think about it even more, I really have no idea of what I'm talking about. Most of the time that I've been mean to people, when I was younger, it was basically because I was an immature and confused jackass. And, as far as relationships go, who hasn't made a complete ass of theselves at one point or another?